Thanks to the startup boom, a host of companies have recently sprung up that aim to make everything from headphones to ballerina flats perfectly personal, with intuitive sites and apps that allow you to explore your own preferences in great detail. Here, seven of our favorite ways to customize your life this year — without leaving the house.

Ballerina Flats

Margaux promises a perfect-fitting ballerina flat — and goes to unusual lengths to deliver. Currently available in 14 suede hues and five calfhair colors, the brand’s shoes come in standard European sizes or, for a little more money, in a version Margaux makes to order according to your measurements. They’ll send a cute, complimentary fitting kit containing a tape measure, fit guide, postcard and pencil to make it easy — or, to make it even easier, a fit expert will visit you at home for a $15 surcharge (as long as you live in Manhattan). And if they don’t fit perfectly, Margaux will tweak your measurements and send a free replacement.$175-$275, margauxny.com.

Cashmere Sweaters

In the words of the poet: “That sweater is not just blue, it’s not turquoise, it’s not lapis — it’s actually cerulean.” If you’re the type to obsess over such distinctions, ESK’s Custom Colour service is a welcome development: the brand has made eight of its classic sweater styles available knit to order in any of over 100 colors. As an added bonus, while you’re waiting for your delivery, they’ll send you a photo of your particular sweater being created at the company’s mill in Scotland.About $540-$1000, eskcashmere.com.

Haircare

There are, theoretically, 450 million different possible variations of Function of Beauty shampoo and conditioner, which each user builds from the ground up by selecting his or her hair type, structure, moisture level, preferred fragrance and five personal hair goals. (You can tweak the formula each time you order.) The company was founded by two MIT graduates — Zahir Dossa, a computer scientist, and Joshua Maciejewski, an engineer — and has specially designed a robot(!) to fill orders.$26-$38, functionofbeauty.com.

Headphones

The just-launched headphones brand Axel Audio is a family affair, founded by Sam Oh, who’s been in the consumer electronics business for nearly three decades, along with his daughter and son (who happens to be a Korean indie-rock star who recently won “Superstar K,” the country’s biggest “American Idol”-style show). A variety of aesthetic elements of the brand’s cushy over-ear headphones can be customized — ear cup size, plus colors for the headband, insert, ear cup and cable. But the more exciting development is that the sound itself can be tailored, too: You choose your audio experience based on the kind of music you listen to most. (If you’re not sure which to choose, they’ve developed an app that will analyze the perfect “Soundscape” for you based on your Spotify playlists.) The headphones are also completely modular, meaning you can swap the ear cups out if you’re transitioning from Biggie to Brahms or vice versa.$145-$175, axelaudio.com.

Men’s Shirts

Over the last few years, online bespoke services have been an area in which men’s wear developments have, for once, outpaced women’s wear. It makes sense: tech-y dudes want to figure out how to “hack” fashion, for one thing; and, for another, there’s less variation in men’s body shapes than in women’s, meaning it’s easier to customize clothes for them. There are plenty of options — Black Lapel and Indochino for suits, Ori for jeans — but we’re especially intrigued by MTailor, an app that fits men for shirts in under 30 seconds using just a smartphone camera. The brand boasts that its shirts, available in dozens of colors and patterns, fit 20 percent better than one adjusted by a real live tailor. (Its founders were recognized by Forbes on its 30 under 30 list this month.)Starting at $69, mtailor.com.

Sneakers

Sneakerheads have been customizing their kicks online for years, and at this point, most of the major players — Nike, New Balance, Reebok and Converse — will let you choose your color combinations, materials or both to create individualized versions of their most popular silhouettes. (Nike’s selection is especially large.) But Adidas wins the bespoke-sneaker game with its MiZXFlux app, which sounds like something from a George Saunders story but is actually a neat, easy-to-use little app that allows you to print any photo you like — or whatever strikes your fancy from among some of their own designs — onto a pair of their ZX Flux models, a revamped revival of the brand’s ’80s-era ZX 8000 shoe. Last year, Adidas also unveiled its space-age Futurecraft project, which uses 3-D printing to create a running shoe with a perfectly bespoke midsole; they yet aren’t available commercially, but we’re keeping an eye out.$110 (MiZXFlux), app available for Apple and Android.

Vitamins

Finally, because what you put in your body should be as personal as what you wear on it, WellPath supplements offer a step up from Centrum in the form of either caplets or nutrient-rich powder for shakes. Each set of supplements is a custom mix of vitamins, minerals and herbs combined from more than 50 base ingredients and formulated according to the user’s needs and goals, from immunity to libido — both self-reported and as analyzed by WellPath according to data from services like FitBit and 23andme.$40-$50 for a month’s supply, gowellpath.com.

Sign up for the Open Thread Newsletter

A look from across the New York Times at the forces that shape the dress codes we share, with Vanessa Friedman as your personal shopper.